Results 11 to 20 of about 4,276 (180)

Crystal Plasticity Modeling of Dislocation Density Evolution in Cellular Dislocation Structures

open access: yesMetals
The complex thermal cycles during the solidification process in metal additive manufacturing (AM) lead to the formation of high-density dislocation networks, organizing into submicron-scale cellular structures.
Md Mahabubur Rohoman, Caizhi Zhou
doaj   +2 more sources

Development of geometrically necessary dislocation density and micromechanical fields in solid state thermal cycle

open access: yesJournal of Materials Research and Technology
This study presents a comprehensive analysis of time evolution and spatial distribution of crystallographic geometrically necessary dislocation (GND) density induced by solid-state thermal cycling in an IN718 polycrystal.
Anderson Nascimento, Irene J. Beyerlein
doaj   +2 more sources

Slip band interactions and GND latent hardening in a galling resistant stainless steel [PDF]

open access: yes, 2021
Slip activation, slip band interactions, and GND densities in iron-base, galling resistant alloy Nitronic 60 have been characterised at the grain length scale using small-scale mechanical testing with high resolution digital image correlation and high ...
Poole, Benjamin, Dunne, Fionn
core   +1 more source

Strain-Gradient Crystal Plasticity Finite Element Modeling of Slip Band Formation in α-Zirconium

open access: yesCrystals, 2021
Two methods for the determination of geometrically necessary dislocation (GND) densities are implemented in a lower-order strain-gradient crystal plasticity finite element model. The equations are implemented in user material (UMAT) subroutines. Method I
Omid Sedaghat, Hamidreza Abdolvand
doaj   +1 more source

Geometrically Necessary Dislocation Analysis of Deformation Mechanism for Magnesium under Fatigue Loading at 0 °C

open access: yesCrystals, 2023
This study focused on the analysis of geometrically necessary dislocation (GND) densities for five selected fine-grained magnesium samples. Among the samples, three were tested under different fatigue-loading conditions at 0 °C, one experienced quasi ...
Qizhen Li
doaj   +1 more source

Plastic Damage Assessment in 316 Austenitic Steel Using the Misorientation Parameters from an In Situ EBSD Technique

open access: yesCrystals, 2022
Plastic damage assessment in 316 austenitic steel was performed in this research by using the misorientation parameters derived from an in situ EBSD technique.
Xiao Wang   +5 more
doaj   +1 more source

A new gravity-wave parameterization for atmospheric circulation models with full respect to transience and conservation laws [PDF]

open access: yes, 2023
In this thesis, we present a new framework for gravity wave parameterizations, that relaxes the steady state approximation - the Radiative Transfer gravity wave Parameterization (RTP).
Mai, Matthäus (gnd: 1338452541)
core   +1 more source

Revealing relationships between microstructure and hardening nature of additively manufactured 316L stainless steel

open access: yesMaterials & Design, 2021
Relationships between microstructures and hardening nature of laser powder bed fused (L-PBF) 316 L stainless steel have been studied. Using integrated experimental efforts and calculations, the evolution of microstructure entities such as dislocation ...
Luqing Cui   +5 more
doaj   +1 more source

Ultrafast electron dynamics in molecules within density-matrix-based configuration interaction framework [PDF]

open access: yes, 2023
The main goal of this thesis is to present the results of work concerning photon-induced ultrafast spin dynamics being theoretically modeled within the framework of ab-initio calculations.
Kochetov, Vladislav (gnd: 1306595231)
core   +1 more source

Influence of misorientation angle and local dislocation density on β-phase distribution in Al 5xxx alloys

open access: yesScientific Reports, 2022
Al–Mg alloys undergo sensitization when exposed to elevated temperatures, making them susceptible to intergranular corrosion and stress corrosion cracking. Most of the existing research on microstructure effects on sensitization is centered on the effect
Jahnavi Desai Choundraj, Josh Kacher
doaj   +1 more source

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